added testcases, added converters to java versions

.gitignore

java/src/ipaaca/Initializer.java

java/src/ipaaca/LinkUpdateConverter.java

java/src/ipaaca/LocalIU.java

java/src/ipaaca/PayloadConverter.java

...est/src/ipaaca/ComponentCommunicationIntegrationTest.java

java/test/src/ipaaca/JavaPythonTest.java

python/src/ipaaca.py

python/test/ivy.xml

python/test/src/testipaaca.py